/*
 * TemporaryURLContent.java 9 juil 2007
 *
 * Sweet Home 3D, Copyright (c) 2007 Emmanuel PUYBARET / eTeks <info@eteks.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package com.eteks.sweethome3d.tools;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;

import com.eteks.sweethome3d.model.Content;

/**
 * URL content for files, images...
 * @author Emmanuel Puybaret
 */
public class TemporaryURLContent extends URLContent
{
	private static final long serialVersionUID = 1L;
	
	public TemporaryURLContent(URL temporaryUrl)
	{
		super(temporaryUrl);
	}
	
	/**
	 * Returns a {@link URLContent URL content} object that references a temporary copy of 
	 * a given <code>content</code>.
	 */
	public static TemporaryURLContent copyToTemporaryURLContent(Content content) throws IOException
	{
		String extension = ".tmp";
		if (content instanceof URLContent)
		{
			URLContent urlContent = (URLContent) content;
			String file = urlContent.isJAREntry() ? urlContent.getJAREntryName() : urlContent.getURL().getFile();
			int lastIndex = file.lastIndexOf('.');
			if (lastIndex > 0)
			{
				extension = file.substring(lastIndex);
			}
		}
		File tempFile = OperatingSystem.createTemporaryFile("temp", extension);
		InputStream tempIn = null;
		OutputStream tempOut = null;
		try
		{
			tempIn = content.openStream();
			tempOut = new FileOutputStream(tempFile);
			byte[] buffer = new byte[8192];
			int size;
			while ((size = tempIn.read(buffer)) != -1)
			{
				tempOut.write(buffer, 0, size);
			}
		}
		finally
		{
			if (tempIn != null)
			{
				tempIn.close();
			}
			if (tempOut != null)
			{
				tempOut.close();
			}
		}
		return new TemporaryURLContent(tempFile.toURI().toURL());
	}
}
